Last Sunday, some members of the iReport team found themselves dancing like fools on a MARTA train. My husband's sketch comedy group was behind the madness, and it was all to be part of the Harlem Shake -- the latest viral meme that's sweeping the Internet.

In case you're wondering, that's me in the crazy scuba diver helmet, Nicole rocking out with the lemur, and Germain showing off some sweet umbrella dance moves. You can watch the video here, as long as you promise not to judge us too harshly!

For the uninitiated, the Harlem Shake is a hip-hop dance and the title of a 2012 instrumental track produced by Baauer. In the past week, though, the song spawned a series of 30-second dance videos that start with a masked individual doing the Harlem Shake solo in a group before cutting to a wild dance party featuring everyone on screen.

At this point, it's nearly impossible to keep track of how many Shake videos there are in the world. People have taken the meme into offices, underwater, at a concert arena, and inside a fire truck. And while all of the videos are different, they're all ridiculous and hilarious and fun.

So, why exactly did the Harlem Shake take off? Because it's simple, fun to participate in, and, most importantly, structured. We've long observed that crowd-sourced projects that have clear boundaries allow people to be super creative within those limitations, and the Harlem Shake is a fantastic example of that. The videos all use the same song and start with one person dancing, then erupt into craziness once the beat drops.

At its basic core, the videos are simple. The dorm room one that really kicked off the trend likely took a few minutes to execute. But because of the simplicity and set rules of the meme, people have been endlessly creative and ambitious when it comes too pulling them off. And the popularity of the videos is no surprise, either -- viewers know that watching is only a 30-second investment of time with a great payoff towards the end.

Plus, there's wild dancing and crazy costumes in unexpected places. What's not to love? We only wish that we kicked off the trend first!

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